Additive for iron disulfide cathodes used in thermal batteries

Details Additive for iron disulfide cathodes used in thermal batteries Additive for iron disulfide cathodes used in thermal batteries

1982-03-23

1983-05-10

Walton, Donald L.

Chemistry: electrical current producing apparatus, product, and

Deferred action type

Responsive to heat

429221, 2521821, H01M 452

Patent

active

043830145

ABSTRACT:
The invention comprises thermal batteries employing an FeS.sub.2 depolarizer, i.e. cathode material, and the depolarizer itself. A minor amount of CaSi.sub.2 preferably, 1-3% by weight is provided as an additive in the FeS.sub.2 depolarizer to eliminate the voltage transient (spike) which normally occurs upon activation of batteries of this type. The amount of FeS.sub.2 by weight generally comprises 64-90%.

REFERENCES:
patent: 4018970 (1977-04-01), Jumel et al.
patent: 4163829 (1979-08-01), Kronenberg
Domelen et al., A Review of Thermal Battery Tech., American Society of Mech. Engineers, 9th Intersociety Energy Conversion Eng. Conf.
Levy et al., Studies of the Abnormally High Peak Voltage Observed with FeS.sub.2 Depolarized Thermal Batteries, Sandia Laboratories, 1979, SAND 79-0090.
Quinn et al., Development of a Lithium Alloy/Iron Disulfide 60-Minute Primary Thermal Battery, Sandia Laboratories, 1979, SAND 79-0814.

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